, tensions are rising in cairo andacrossegypt, daysafter that country's new president once hailed as a hero and reformer made a huge power grab that has some labeling him egypt's new pharaoh. tonight supporters and opponents of mohamed morsi are calling for mass demonstrations. nbc's jim maceda is high above cairo's tahrir square. jim, good evening. >> reporter: hi, kate. well, of course, tahrir square behind me was ground zero for egypt's 2011 uprising, but lately it's had a similar feel and the smell of tear gas is back in the air. clashes between morsi opponents and riot police raged through the night and into a second day. protesters turning tahrir square into a tent encampment and pledging to target the besieged president until he designs or rescinds the decrees which give him sweeping powers and put him above the law. the move has triggered riots across the country, injuring more than 300 egyptians. "if morsi does that, we'll be exactly like iran, said this protester. "he is making himself not just a dicer, he's making himself a god." he said he had to take action to take ra